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Which type of interaction is most likely to result in a negative outcome for both parties in a relationship?


A) spitefulness
B) altruism
C) selfishness
D) cooperation

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Which scenario best illustrates the concept of genetic drift?


A) Twelve thousand years ago Native Americans traversed the Bering Strait to settle in the Americas, causing different genetic traits to be favored over others.
B) The genetic mutation that causes sickle cell anemia also increases resistance to malaria, increasing the frequency of the diseased allele in the general population.
C) The prevalence of depression is greater in populations where the serotonin transporter gene translocated to position q21 along chromosome 17.
D) There is a higher than average rate of Ellis-van Creveld syndrome in the Amish community because the diseased allele was introduced by some of the original Amish settlers.

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Tara and Boris, expectant parents, wonder about the endless possibility of traits their unborn son might inherit from them (e.g., Tara's red hair and allergies; Boris's tall frame and poor eyesight) . As a genetics expert, you tell them that after cell division, the egg or sperm contains _____ chromosomes; thus, a male or female can produce _____ different combinations of his or her chromosomes.


A) 23; 223
B) 23; 232
C) 46; 246
D) 46; 462

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The process by which survival and reproduction pressures act to change the frequency of alleles in subsequent generations is referred to as ____.


A) coercive inheritance
B) natural selection
C) randomized lineage
D) genetic exclusion

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Who is credited for first describing the contrast between heredity and environment as "nature versus nurture"?


A) Charles Darwin
B) Francis Galton
C) Gregor Mendel
D) James Watson

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What do modern biologists describe as the "descent with modification from a common ancestor"?


A) genetic lineage
B) heritability
C) the human genome
D) evolution

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What is true of genetic mutations?


A) They typically lead to disease.
B) They are a rare occurrence.
C) They typically cause no phenotypical change.
D) They generally lead to a survival advantage.

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You are attending a family reunion of your dad's extended family. You often wonder how you could be related to any of them based on their physical and behavioral characteristics. What is the chance you share an allele with your first cousins?


A) one sixteenth
B) one eighth
C) one fourth
D) one half

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What do humans share that allows them to be so similar to one another, but different from other animals?


A) alleles
B) genes
C) number of chromosomes
D) structure of DNA

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Dr. Pohlson is studying the heritability of self-confidence. Because all of his research participants are upper-middle class adolescents from the same private school in New York City, the heritability of self-confidence will appear to be ____.


A) low
B) high
C) nondiscrete
D) constant

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The process of gene expression involves ____.


A) replicating a cell's genetic makeup during division
B) influencing the behavior of a segment of society
C) converting genetic instructions into a feature of a living cell
D) chromosomal recombination during gamete formation

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Each cell type in the human body has ____.


A) the same gene expression
B) a different set of genes
C) a different set of genes, but the same gene expressions
D) the same set of genes, but different gene expressions

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An error that occurs when DNA is replicated is referred to as a ____.


A) mutation
B) migration
C) splicing event
D) genetic drift

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Which of the following best describes a characteristic of intersexual selection?


A) the tendency to view close relatives as unattractive
B) ensuring species continuation via heterosexual behavior
C) having characteristics that are likely to attract a mate of the opposite sex
D) choosing a mate with genetic diversity

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Explain how mutation, migration, genetic drift, and natural selection affect evolutionary processes. Provide a specific example for each.

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Mutations are errors that occur when DNA...

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Simon has curly hair. If he is homozygous for the gene that determines curly hair, what is true of his parents?


A) They must each have a recessive allele for straight hair.
B) They have together contributed four dominant alleles for this gene.
C) They have contributed the same type of allele for this gene.
D) One, but not both, of his parents, have contributed an allele for curly hair.

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In one study, rats licked frequently during infancy by their mothers were calmer than rats licked infrequently when faced with stress later in life. What is the most likely explanation for this?


A) The rat pups that were frequently licked learned to engage in the licking behavior as a coping strategy during times of stress.
B) Because mothers who chose to lick their pups had a calmer demeanor, their pups were raised in less stressful environments.
C) By licking their pups, these mothers had influenced the expression of genes that influenced responses to a stress hormone.
D) The "licking" prone mothers only cared for the calmest pups of the litter, causing the more aggressive pups to die prematurely.

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Compared with hunter-gatherer societies, agricultural societies are more ____.


A) matriarchal
B) patriarchal
C) egalitarian
D) homogenous

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The field of evolutionary psychology directly descends from which early school of thought?


A) functionalism
B) dualism
C) gestaltism
D) structuralism

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The study of gene-environment interactions in the production of phenotype is called ____.


A) genospherics
B) epigenetics
C) biogenics
D) phenomics

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